Chair hub



Oct. 26 1926.

1,604,144 s. M. BUMP CHAIR HUB Filed March 9, 1925 2 Sheets-Sheet 1 "imam" ufl'llllllllll L Patented Oct. 26, 1926.

STAT-ES NT E.

sreivcnnivi. Bin/122e, "QF'GLEVELAND, 01110, ASSIGNOR "roar-m ntim'rcnnin smmriNe a IVIBAN'UFACTURING YCOMEANY, or CLEVELAND, oHIo, A CORPORATION or onto.

"03am HUB.

' This'inventionrelates-to hubs' lor chairs, and more particularly to hubs such as are used with revolving chairs. The general object of "the invention is to provide an inn-- provedconstruction and arrangement of parts constituting such hub whereby the said parts may be conveniently assembled and supported in assembled position and which will serve, when assembled, to sup- ,port the inner ends oi the legs in anetfi'cient manner. a i j a Further and more. limited objects of the inventioirwill appear hereinafter andmwill be realized in and through the construction and arrangement ,of parts shown in the drawings wherein Fig. 1 represents aside elevation of the base of a chair of the type referred to and having my hub applied thereto; Fig. 2 agplan view of the hub; 3921 transverse sectional view through the hub and the inner ends of the legs; ,4

a detail in perspective tot one of the hub segments; and 55 a detail in perspective ofthe inner end of one of the chair legs.

Describing the various parts by reference characters, 1 denotes each of the four legs of a chair, the same being shown asproin which the standard (not shown) "extends. j j

h For the purpose of clamping the inner ends of the legs and forming a hub for the tube, standard and legs, I provide four ,pressed metal hub segments, ;eaeh"having a portion or portions of its sides adapted to bear against the adjacent sides ofadja'cent legs and each having a projection at'each -side thereof adapted to enter the recesses in the sides of such adjacent legs, together with a cooperating construction of thesegmentsand of the top-and bottom plates of the hub such as will enable the segments, not only tQlJG assembled-into ahub, but to be drawn inwardly or toward, the axis of the tube by virtue of the assembling 'op'eration, thereby causing the legs to be firmly and securely fastened to and between the hub segments.

3 denotes one of the 'hub segments generally. Each segment is qnade preferably from sheetmetal, whichis given theproper shape by means of suitable dies. NVhenthe shaping operation is completed, each blank will i have assumed the shape shown in 1 the drawings, being provided with a cylindrical body 4. Projec'tingtrom each side of the top and the. bottom "of said body are radial flanges 5, the said flanges being turnedout wardly and being adapted "to bear against the sides of the two legs'between which the segment is interposed. The central portion off each segment is provided at each edge the'reo-t'with an intermediate flange 6, each flange preferably being bent so as to eX- t'end at rightangles toward the chair leg with which it cooperates. The flanges project circumte'rential'ly beyond the flanges 5 and are adapted to -ent'er vertical slots 2 provided in the faces of the legs 1. Each hub segment i prcvided,in addition "to the flanges 5 and ,6, with top and'bottom centrally-arranged 'lug's, shown at 7, 7.

For the purpose supportingthe tube 2 and assembling the hub segments and legs, I employ'top and bottom plates which 'arc preferably substantially identical in con struction. These plates are indicated gen erally at 8 and 8?, respectively, and are preferably approximately circular in outline having radial projections 8, 8, respec- ,tively. vided with slots, indicated generally at 9. vided with a central tube or sleeve 2 with- At least one ofthe platesis pro- The inner wall9 of each slot isforme'd on a curve described from a center eccentric with respect to the axis o fthe tube 2 and of the'hub, whereby the said wall constitutes a spiral which approaches the center of the hub from right to left. The inner portion 19 Oil the outer wall ofthe slot -isiparallel with the opposite portion of the inner wall, the space between the part 9 of the outer wall and the "opposed vpart 9 being approximately equal to the thickness of the metal of which the lugs 7 are composed. At the opposite end, the slot is widened, the outer wall 9at this=portionof the slot also being preferably concentric with the inner wall but spaced further therefrom than is the part 9 The inner end ot the wall segment 9 is connected with the adjacent end of the wall segment 9 by an inclined segment 9.

\Vith the parts constructedand arranged as described, the legs, tube and hub will be assembled as follows:-the legs are positioned'about the tube 2 in approximately the manner indicated in Fig. 3, the hubseg ments are then inserted between the legs,

the'fianges 6 slipping along the slots 2 and the-flanges 5 bearing against the sides of the legs. The top and bottomvplatcs are then applied, with the lugs 7 in the widened portions of the slots 9. These plates, and the hub assembly generally, are then held in a suitable jig and the plates are pressed to ward each other and rotated in an appropriate direction to cause the lugs 7 to be moved radially inwardly by engagement with the wall segments 9 and 9 of the SlOtS.' lVhen the plates have been rotated a sutlicient distance and the flanges are gripping the legs firmly, the plates are secured to the legs by means of screws 10.

' If desired the special slot-construction shown and described herein may be "omitted from the bot-tom plate, the lugs 7 being projected through openings adapted to receivc and size the same and being clinched or riveted thereto. The bottom plate is shown as provided with elongated radial arms 8 having openings 8 for the screws 10.

By reason of the construction and arrangement of parts set forth herein, I enabled to provide a hub assembly forthe legs of chairs and similar articles, the component'members' of which assembly may be produced at a comparatively small expense and which, whenfass'embled, will produce a very eflicient hub-construction, serving to clamp the legs securely in place. i v

Having thus described-my invention, what I claim is: 7 V

1. A hub construction of the character described comprising a plurality of hub segments each having radially extending edge portions adapted to engage the adjacent side faces of chair legs and edge portions projecting circumferentially beyond such sition about the inner ends of such legswith' the circumferential edge portions in slots provided in the side faces of said legs and the radial edge portions engaging such faces adjacent to said slots.

' 3. A hub construction of the character describedcomprising a plurality of hub segments each having a portion of each lateral edge thereof bent radially outward. and an additional portion of each such edge pro- 'jecting at an angle to and extending beyond such radial projection and adapted to enter a slot inthe leg of a chair adjacent thereto, and means for securing the said segments in assembled position about the inner ends of such legs with the radial edge portions engaging the side faces of said legs and the other edge portions entering slots provided in the side faces of said legs adjacent to the parts engaged by such radial portions.

A hub construction of the character described comprising a plurality of hub segments each having at each lateral edge thereof an upper and a lower radially extending flange and an intermediate flange projecting circumferentially beyond such upper and lower flanges, and means for securing the said segments in assembled position about the inner ends of chair legs with'the intermediate flanges seated in slots in said legs.

5. A hub construction of the character de scribed comprising a plurality of hub segments each having at each lateral edge thereof an upper and a lower radially outwardly extending flange and an intermediate flange projecting circumferentially beyond such upper and lower flanges, and means for securing the said segments in assembled position about the inner ends of chair'legs with the intermediate flanges seated in recesses in said legs. j i

'6. A hub construction of the character described comprising a plurality of hub segments each having at each lateral edge thereof an upper and a lower radially'extending flangeand an intermediate flange projecting circumferentially beyond such upper and lower flanges, each segment also having at the top and bottom thereof an integral lug, and top and bottom plates having apertures for the reception of said lugs and adapted to be secured to the inner ends of chair legs.

'FQThe combination, with angularly disposed chair legs, of hub segments each interposed between the inner ends of adjacent chair legs, a plate to which corresponding ends of the said 'segmentsare secured, a

second plate, and means for securingt-he opposite ends of the hub segments to such second plate, the said means comprising lugs carried by the last-mentioned ends of the said segments respectively and slots in the second plate for said lugs, the outer wall of each slot comprising an nner or seating portion and an outer portionspaced from the inner wall a greater distance than the first portion and connected with the said first portion by an inclined wall.

8. The combination, with angularly disposed chair legs, of hub segments each in terposed between the inner ends of adjacent chair legs, each segment having edge portions adapted to bear against the sides of the adjacent chairlegs, a projection at each edge adapted to enter a seat therefor in the chair leg adjacent thereto, and a lug at the top and at the bottom thereof, a plate to which the lugs at corresponding ends of the said segments are secured, a second plate,

and means for securing the opposite ends of substantially parallel with the inner wall 10 the hub se ments to such second plate, the and an outer portion spaced from the inner said means comprising lugs carried by such Wall a greater distance than the first portion opposite ends of the said segments, respecand connected with the said first portion by tively, and slots in the second plate for said an inclined val].

lugs, the inner Wall oi each slot being formed In testimony whereof, I hereunto aiiix my 15 on a spiral approaching the center of the signature.

hub construction and the outer Wall of each slot comprising an inner or seating portion SPENCER M. BUMP. 

